International Journal of Civil EngineeringIJCEEngineering & Technologyhttp://ijce.iust.ac.ir18agent21735-05222383-387410.22068/IJCEenjalali1389121gregorian20113191online1fulltextenEvaluating the overstrength of concentrically braced steel frame systems considering members post-buckling strength Structure-SteelStructure-SteelTechnical NoteTechnical Note<p>Inelastic deformation of structural components is generally acceptable in seismic design. In such behavior, the strength of structures increases while plastic hinges are formed in members frequently. The strength revealed during the formation of plastic hinges is called "overstrength". Overstrength is one of the important parameters in the seismic design of structures. The present study tries to evaluate the overstrength of the concentrically steel braced frames (CBFs), considering reserved strength, because of members post-buckling. As such, a static nonlinear (pushover) analysis has been performed on the model buildings with single and double bracing bays, different stories and brace configurations (chevron V, invert Vand X-bracing). It has been realized that the number of bracing bays and the height of buildings have a low effect on reserve strength due to brace post-buckling. However, these parameters have a profound effect on the overstrength factor. These results indicate that the overstrength values for CBFs, proposed in seismic design codes, need to be modified.</p>
Concentrically steel braced frames, Overstrength factor, Post-buckling strength, Response modification factor5762http://ijce.iust.ac.ir/browse.php?a_code=A-10-233-1&slc_lang=en&sid=1M.Mahmoudim.mahmoudi@srttu.edu18003194753284600100961800319475328460010096Yes
Shahid Rajaee Teacher Training UniversityM.Zareemahdizarebalani@gmail.com18003194753284600100971800319475328460010097No Shahid Rajaee Teacher Training University